Jewelweeds are pretty flowers that grow in wet, shady spots all over the Northern Hemisphere. According to a recent experiment, they seem to know their own flower family —or at least, recognize whether or not they came from the same mother plant. Together with other through their leaves, but through their roots.
Scientists planted jewelweeds in pots with either siblings（兄弟姐妹）or strangers. Sibling plants were grown from seeds that came from the same mother plant. Stranger plants were grown from seeds from different plants.
When jewelweeds were planted in pots with strangers, the plants started to grow more leaves than if they had been planted alone. This response suggests that plants are competing with strangers for sunlight, since a plant with more leaves can receive more light and make more food.
When jewelweed seedlings were planted with siblings, they few a few more branches than they normally would if they were alone—but they did not start growing lots of extra leaves. This behavior suggests the plants are more likely to share resources, rather than compete.
The plants only responded this way when they shared soil. If stranger seedlings were planted in different pots and placed next to each other, for example, they did not grow more leaves. This different shows that the plants must use their roots to detect sibling plants in the same soil. In 2007, Dudley and her team studied the Great Lakes sea rocket, a plant that grows on the beach—where it may be hard to get fresh water. In that experiment, the botanists observed that when sea rockets were planed with siblings, they tolerated each other. But when they were planted with strangers, the sea prickets reacted by working extra hard to grow lots of roots, but not extra leaves.
The different types of plants may react in different ways, but they have one thing in common: the roots. In both experiments, on Jewelweeds and sea rockets, the key was the shared soil—and other plant species may turn out to show similar behavior. These experiments, as well as earlier experiments, suggest “The phenomenon is quite common.” Says Hans de Kroonof, an ecologist in the Netherlands.
57．In Paragraph 1, the author mentions a recent experiment of Jewelweeds to___________.
A．make a comparison  B．introduce a topic
C．describe a pretty flower   D．put forward a new theory
58．What can we know from the experiments done by scientists?
A．Jewelweeds can grow in the Northern Hemisphere.
B．Jewelweeds can grow in wet, shady spots.
C．Jewelweeds are more friendly to their siblings than to stranger plants.
D．jewelweeds can recognize their siblings through leaves.
59．If jewelweeds and their siblings are planted in different pots and placed close to one another, they will___________.
A．start to grow more leaves       B．detect the strangers 
C．compete with sibling plants     D．grow normally
60．The best title of the passage would be___________.
A．Flower family knows its roots
B．The growing conditions of Jewelweeds
C．Jewelweeds and sea rockets
D．The stranger plant recognize each other
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：完形填空


第Ⅱ卷（共45分）
第四部分 書面表達(dá)（共兩節(jié)，滿分45分）
第一節(jié) 閱讀表達(dá)（共5小題；每小題3分，滿分15分）
閱讀下面的短文，請根據(jù)短文后的要求答題（請注意問題后的字?jǐn)?shù)要求）
[1] If you are a recent social science graduate who has had to listen to jokes about unemployment from your computer major classmates, you may have the last laugh. There are many advantages for the social science major because this high-tech “ Information Age” demands people who are flexible (靈活的) and who have good______________.
[2] There are many social science majors in large companies who take up important positions. For example, a number of research studies found that social science majors have achieved greater managerial success than those who had technical training or pre-professional courses. Studies show that social science majors are most suited to change, which is the leading feature of the high speed, high-pressure, high-tech world we now live in.
[3] Social science majors are not only experiencing success in their long-term company jobs, but they are also finding jobs more easily. A study showed that many companies had filled a large percentage of their entry-level positions with social science graduates. The study also showed that the most sought-after (廣受歡迎的) quality in a person who was looking for a job was communication skills, noted as “very important” by 92 percent of the companies. Social science majors have these skills, often without knowing how important they are. It is probably due to these skills that they have been offered a wide variety of positions.
[4] Finally, although some social science majors may still find it more difficult than their technically trained classmates to land the first job, recent graduates report that they don’t regret their choice of study.
76. What’s the main idea of the passage?  (Please answer within 10 words.)
_________________________________________________________________________
77. Which sentence in the passage can be replaced by the following one?
For instance, a study showed that social science majors had held more important positions, compared to those technically trained students.
________________________________________________________________________
________________________________________________________________________
78. Fill in the blank with proper words or phrases to complete the sentence. (Please answer within 5 words.)
_________________________________________________________________________
79. What have you learned about the social science majors in finding a job in this high-tech “Information Age”? (Please answer within 30 words.)
________________________________________________________________________________________________________________________________________________
80. Translate the underlined sentence in the second paragraph into Chinese.
________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空


第二節(jié)完形填空（共20小題；每小題1分，滿分20分）
閱讀下面短文，掌握其大意，然后從36 ~ 55各題所給的四個選項（A、B、C和D）中，選出最佳選項，并在答題卡上將該項涂黑。
Today I felt very uncomfortable studying English as usual．My eyes were   36   and my mind was confused．I buried my head deep in the great pile of books．Many vocabulary words   37  
my mind．As more and more entered，I   38   focus，and my   39   became crazy．The clock hands were pointing at twelve. I always   40   the time when I study．Without any fruitful results，I felt more   41   and tired．I   42   up and walked to the living room just to take a little break．  43   that would make me feel better．The street lamps looked like stars outside the window．A few scattered(分散的)branches   44   shadows on the French window．Something seemed more   45   and quiet than before．I walked to the   46   slowly，and let my face press against it，  47   very carefully…oh my God!!…It’s snow! It was very bright and covered up the whole   48   while I was studying English painfully, so white and so quiet．At this moment, I was so   49   that I felt like I might burst into tears．The snow was like a spring   50   into my heart，and my eyes were shining with it．All my pain and tiredness   51   at this moment，as the snow dropped into my heart．
I quickly became calm again，as the excitement went away．I sat on the bed silently，and drew the   52   to one side to let the white house and white tree stay just beside my bed．I thought this must be a(n)   53   from God，because I liked snow so much．  54   I was weakest and most helpless in this world，nothing could inspire me but   55 ．I should inspire myself from such a beautiful scene．
36.A. closed                  B. tired                         C. shining                     D. weeping
37.A. left                      B. confused                   C. filled                        D. impressed
38.A. lost                     B. got                           C. realized                    D. changed
39.A. thoughts               B. feeling                      C. words                       D. concept
40.A. waste                   B. limit                         C. remember                 D. forget
41.A. flexible                B. guilty                       C. unhappy                   D. curious
42.A. stood                   B. turned                      C. checked                    D. hurried
43.A. Sure                    B. Maybe                      C. Immediately              D. Always
44.A. shook                  B. cast                          C. resembled                 D. printed
45.A. disappointing        B. frightening                C. bright                       D. light
46.A. shadow                B. lamp                        C. branch                      D. window
47.A. looking                B. thinking                    C. moving                     D. cleaning
48.A. night                   B. house                       C. world                       D. mind
49.A. disturbed              B. excited                     C. surprised                   D. bored
50.A. pouring                B. delivering                 C. drilling                     D. rising
51.A. occurred              B. arose                        C. escaped                     D. disappeared
52.A. bed                      B. curtain                      C. desk                         D. book
53.A. anger                   B. smile                        C. gift                          D. punishment
54.A. As usual               B. As a result                 C. At last                      D. At a time
55.A. snow                   B. God                         C. white                        D. beauty

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空


第二節(jié)：完形填空（共20小題；每小題1分，滿分20分）
請認(rèn)真閱讀下面短文，從短文后各題所給的A、B、C、D四個選項中選出最佳選項，并在答題卡上將該項涂黑。
I was captured by the enemy and thrown into a jail cell. I was sure from their looks and 36 treatment that I was to be killed the next day. Terribly nervous and worried, I felt in my pockets to see if there were any cigarettes, which had 37  jailers' search. Surprisingly, I found one. But because of my shaking hands, I could 38 get it to my lips. After several attempts, I finally succeeded, but almost immediately 39  that I had no matches. They had taken those away from me.
I looked through the bars at my jailer. He did not make eye contact with me. 40 one did not care to see a dying man. I 41 out to him, "Have you got a light?" He looked at me, shrugged and came 42  to light my cigarette.
43 he came close and lit the match, his eyes unintentionally 44  mine. At that moment, I smiled. I don't know why I did that. Perhaps it was 45 ， perhaps it was because, when you get very close, one to another, it is very  46   not to do that. In that instant, it was as if a spark(火花)jumped across the  47  between our two hearts, our two human souls. I know he didn't want to, but my smile leaped through the bars and  48  a smile to his lips, too. He lit my cigarette but stayed near, looking at me directly in the eyes and continuing to smile. I kept smiling at him, now  49  of him as a person and not just a jailer.
"Do you have kids?" he asked. "Yes, here, here." I 50  searched for the picture of my family in my wallet. He, too, took out his family's and began to talk about his plans and hopes for them. My eyes were filled with  51 . I said that I feared that I'd never see my kids again, never have the chance to see them  52  up. With my words, his eyes turned wet, too. Suddenly, he    53  my cell and silently led me out. Out of the jail, quietly and by back routes, out of the town. There, at the 54 of town, he released me. And without another word, he turned back toward the town.
My life was saved by a smile.
Yes, the smile, the unaffected, unplanned, 55  connection between the souls of people, actually saved my life.
36.A. rough           B. special              C. equal             D. generous
37.A. prevented       B. escaped         C. lost                D. abandoned
38.A. directly         B. easily        C. quickly             D. barely
39.A. realized         B. thought         C. recognized         D. believed
40.A. All in all             B. Above all      C. First of all         D. After all
41.A. called           B. left            C. walked              D. made
42.A. over             B. in                  C. out                D. by
43.A. Until            B. Although       C. Since             D. As
44.A. avoided         B. touched         C. moved              D. opened
45.A. nervousness     B. disappointment  C. encouragement     D. calmness
46.A. easy             B. dishonest       C. likely             D. hard
47. A. bridge         B. trust           C. gap                D. belief
48.A. forced          B. brought         C. returned            D. offered
49.A. afraid           B. ashamed        C. proud            D. aware
50.A. aimlessly         B. casually         C. nervously          D. calmly
51.A. tears             B. regrets              C. hopes             D. anxieties
52.A. wake            B. grow          C. come             D. live
53.A. destroyed         B. folded         C. unlocked           D. broke
54.A. center           B. front          C. edge              D. border
55.A. usual            B. natural              C. different            D. enthusiastic

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空


第二節(jié)：完形填空(共20小題；每小題1分，滿分20分)
閱讀下面短文，掌握其大意，然后從36～55各題所給的四個選項(A、B、c和D)中選出最佳選項，并在答題卡上將該項涂黑。
I moved to this small town at the age of twelve．After getting  36   in our new house and starting school，I began to explore the   37  area．I was exploring the pond when I discovered the fish．
There were two of them，one about a foot long，  38  the other just a little smaller，and they were the most beautiful fish I had  39  seen．They had blue and yellow and red  40  from head to tail．Before they saw me，they swam  41  over the sand just under the front edge of the large cedar(杉)tree which had long before fallen  42   the pond．
I went back the next day after school  43   with about six feet of fishing line and a hook borrowed from our elderly neighbor．a(chǎn)nd half a dozen worms I had   44  out of the garden．We did not own any fishing tool，and   45  a city kid，my fishing experience, had  46  week long visits to my relatives．
I took a shortcut  47  some fallen cedars on my way to the pond．As I was climbing over one tree and ducking under another，I  _48  my footing，and my soup can of worms went flying into the air．My  49   was only increased when I noticed that my worms had disappeared．
I went to the pond，looked down again，and there they were．I made a few  50   to catch them by hand，but I soon realized it was never going to  51 ．I had been trying to catch them for quite a while without actually even  52   either one．After each attempt，they   53  suddenly go around the pool，then settle back under the log．They could really go  54 ，but they were just too fast to be caught．I was wet and   55   and it was time to go home．
36．A．seated          B．settled         C．separated                D．served
37．A．deserted       B．crowded      C．surrounding            D．distant
38．A．but              B．a(chǎn)nd             C．thus                       D．so
39．A．hardly         B．seldom        C．never                     D．ever
40．A．dots            B．signs           C．signals                   D．symbols
41．A．nervously    B．hopelessly     C．effortlessly             D．difficultly
42．A．through       B．a(chǎn)cross          C．past                    D．by
43．A．a(chǎn)rmed         B．matched       C．handled                  D．a(chǎn)ccompanied
44．A．put              B．dug             C．pulled                    D．searched
45．A．for              B．with            C．a(chǎn)s                          D．despite
46．A．consisted of  B．compared with  C．made up                D．taken up
47．A．beyond        B．a(chǎn)gainst         C．between                 D．through
48．A．lost             B．sank                   C．sent                D. threw
49．A．doubt          B．disappointment    C．courage           D. strength
50．A．steps           B．a(chǎn)ctivities             C．a(chǎn)ttempts          D. movement
51．A．work           B．complete             C．cover              D. catch
52．A．noticing               B．touching             C．holding           D. feeling
53．A．should          B．might                 C．would             D. could
54．A．somewhere    B．a(chǎn)nywhere           C．nowhere          D. everywhere
55．A．excited        B．frightened           C．worried           D. discouraged

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空


第二節(jié) 信息匹配（共5小題；每小題2分，滿分10分）
閱讀下列應(yīng)用文及相關(guān)信息，并按照要求匹配信息。請在答題卡上將對應(yīng)的選項涂黑。
（注意：如選E 請把A、B兩項同時涂黑，如選F 請把C、D兩項同時涂黑）
Six people ordered the following Take-away but the labels attached to the boxes were somehow misplaced on the way of delivery. Please find the customers their own orders according to the description of their taste.
56. Tom is a teenager who is crazy about KFC or McDonald’s, so he usually have take-away instead of going to the school canteen.
57. Charlie normally has something from a local western restaurant. He is not very particular about food.
58. Vincent is a weightlifter on the local club and he always needs a heavy meal to provide extra energy for his training. But he is on a tight schedule with a competition drawing near.
59. Sue is on a diet and prefers something light. 
60. Emily is vegetarian and never has anything that has to do with meat. She is also allergic to seafood.
A.  Stir Fried Mixed Seafood with ginger & spring onion; Deep Fried Fish & Vegetables
B.  Chinese Mushroom with Choy Sum; Steamed Tofu with Preserved Cabbage
C.  Beef steak & a seafood pizza.
D.  A Fruit Salad & A Club Sandwich
Two big Macs & Corn Soup
F.  Fried Chicken Nuggets, Cheeseburger & Potato Chips

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


GENEVA(Reuters) -Pregnant women and other people at high risk should be vaccinated(注射疫苗) against the H1N1 swine flu virus as the cold weather begins to bite in the northern hemisphere(半球), the World Health Organization(WHO) said on Tuesday.
It voiced concern that some vulnerable(弱勢的) people don’t have access to the pandemic(傳染病) vaccine, which the WHO stressed had not caused any unusual side effects in hundreds of thousands of people to have received it worldwide so far.
“Certainly the fact that the vaccine isn’t being used by those who would have access to it and who would be in priority risk groups is of concern, yes,” WHO spokesman Gregory Hartl told a news briefing.
At least 5, 712 people have died from the swine flu virus, according to the United Nations agency. Health workers, pregnant women and people with conditions such as asthma are deemed at greatest risk and should be top priority for getting the shot.
“We have seen many, many examples of people in high risk groups such as pregnant women who have very severe disease or outcomes. These outcomes could be in all likelihood avoided if one were to get vaccinated,” Hartl said.
Unlike seasonal flu, which is most dangerous to the elderly, H1N1 is hitting younger adults and children especially hard.
The WHO recommends a single vaccine dose for protecting adults against H1N1. It has also urged governments to consider giving a single dose to as many children under age 10 as possible, but says more research is needed into child dosages.
In the United States, studies show that children under the age of 9 will need two doses of the vaccine to be fully protected, officials there said on Monday.
Parts of North America and Europe have already crossed the epidemic (流行病) threshold( 開始了), ahead of the normal influenza season which peaks in January-February for the northern hemisphere, WHO says.
51.According to the passage, what is WHO probably most concerned about now?
A. Whether the vaccine has side effect or not.
B. How many people are infected by the H1N1 swine flu virus.
C. Whether pregnant women and those at high risk can get the vaccination.
D. What is the difference between H1N1 and seasonal flu.
52.According to the passage, what group of people are more vulnerable to H1N1 swine flu virus?
A. The elderly.                  B. A teenager with asthma. 
C. An adult with heatstroke.               D. A newly-born baby.
53.In paragraph 4, “getting the shot” means ____________.
A. being shot      B. being vaccinated     C. being cured     D. getting killed
54.What can we learn from this passage?
A. Pregnant women will surely get severe disease if infected with H1N1.
B. Seasonal flu is more likely to hit younger adults and children.
C. one more dose of vaccine should be given to the children under 9.
D. About 6000 people have died from seasonal flu.
55.   Which of the following statements is TRUE?
A. Pregnant women need flu shot. 
B. Differences between H1N1 flu and seasonal flu.
C. The harm caused by H1N1 swine flu virus.
D. A breakthrough in H1N1 cure: vaccination.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


On April 16th，don`t be surprised if the womann next to you on the subway looks like she forgot to get dlessed for work.She won`t be alone．People in their pajamas（睡衣褲）will be spotted all across the country一traveling on the subway,in line for their morning coffee,and even walking into office buildings．That`S because people will be trading in their business suits for pajamas and celebrating National Wear Your Pajamas to Work Day．
There is nothng more comfortable than sitting at your desk in soft cotton flannel（法蘭絨的）paiamas or wearing your favorite slippers while you deeply think about the day`s tasks,The PajamaGram Company,Which produces and sells pajamsa,believes that Americans need a break,especially the day aher income taxes are due．That`s why they are celebrating National wear Your Pajamas to Work Day．
Wearing pajamas to work can be relaxing and can actually help employees be more productive.David Alien，author of The Art of Stress-free Productivity,promotes（倡導(dǎo)）relaxation to increase Productivity．"Our ability to be Productive is directly proportional（成比例的）to our ability to relax,"said Allen."Only when our minds are clear and our thoughts are organized can we achieve stressftee productivity．"
At the Pajama Gram Company,it`s not unusual to find employees Wearing their pajamas at important meetings or at their desks.The Company even invented the term "life is bananas,send some pajamas," to describe how they feel about the world we live in.
The PajamaGrma Company offers over 100 styles of pajamas,robes,slippers and spa products．Each PajamaGram gift comes along with beautiful Pajamas，lavender（熏衣草）bath tea,Do-Not-Disturb sign for the door and a gift card.
61. On APril 16th，people in America often ____________.
A.forget to change pajamas for work
B.do pajama business on the way to Work
C.go to wook in their pajamas
D.celebrate their traditional festival
62. People celebrate this special day because they are expected to
A.Work in a more effective way
B.increase their ability to relax
C.spend less on their daily clothes
D.have more time to rest
63. The underlined word "bananaS" in the last paragraph can be replaced by ___________.
A.easy and free                   B.happy and interesting
C.crazy and busy           D.full of fruits
64. According to the passage，which gifts will you receive from the PaiamaGram Company？
a.a sleepwear  
b.a beautiful box    
c.a Do-Not-Disturb sign
d.lavder bath tea
e.a personalized gift card
A.c,d,e          B.a,c,d          C.b,c,d,e   D.a,c,d,e
65. The main purpose of the passage is to _________.
A.advertise the PajamaGram Company
B.introduce a special day in America
C.describe the busy life In America
D.advise people to buy more pajamas

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空


第二節(jié)信息匹配 (共5小題；每小題2分，滿分10分)
閱讀下列應(yīng)用文及相關(guān)信息，并按照要求匹配信息。請在答題卡上將對應(yīng)題號的相應(yīng)選項字母涂黑。首先，讀下面應(yīng)用文：
The Travel Pavilion. Explore places you have never been to before, and experience different way of life. Visit the Amazon jungle village, the Turkish market, the Tai floating market, the Berber mountain house and others. Talk to the people there who will tell you about their lives, and things they make. You can try making a carpet, making nets, fishing. . .
The Future Tower. This exhibition shows how progress will touch our lives. It allows us to look into the future and explore the cities of the next century and the way we’ll be living then. Spend some time in our space station and climb into our simulator for the journey to Mars!
The Nature Park. In the Safari Park you can drive among African animals in one of our Range Bruisers: see lions, giraffes, elephants in the wild. Move on to the Monkey Park to watch the monkeys. And then there is still the Aviary.
The Pyramid. This is the centre of Adventure land. Run out of film, need some postcards and stamps? For all these things and many more, visit our underground shopping centre. Come here for information and ideas too.
The Ancient Village. In the village you will find people live a simple life just as the ancient people did. They wore ancient clothes and were selling the old goods and food. You can even watch an old dance performed by some actors and actresses.
The Underwater World. Here you will find a variety of fish and even some kinds of sharks. You will think you are in the water but of course this is not true. If you are interested in fish I suggest that you pay a visit to it.
請閱讀下面?zhèn)�人的信息，然后匹配他或她的最佳選項：
56. Michelle    I am interested in science and I hope very much to know what our life will be like in the days to come.
57. Harry    After visiting the Adventure land I want to buy my friend and parents some souvenirs.
58. Maria    I am Nostalgia and I often recall the past days. I think people used to live more happily than us.
59. Dick    I am tired of the unchanged and dull life now and what I look forward to is a completely new life.
60. Alice    I read a lot about the whales but I haven’t seen them for myself. I hope this dream can come true in Adventure land.
人名                          游覽地
56. Michelle                      
A．The Travel Pavilion
57. Harry		B．The Future Tower
58. Maria		C．The Nature Park.
59. Dick		D．The Pyramid.
60. Alice                          E. The Ancient Village
F. The Underwater World

查看答案和解析>>

同步練習(xí)冊答案